Note 6: Investment Securities: Schedule of Gross Unrealized and Fair Value Aggregated by Investment Category (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Less than 12 months | Fair Value
Collateralized mortgage obligations		$ 3,760
Mortgage-backed securities	10,127	61,720
States and political subdivisions		6,436
Total securities by investment category		71,916
Less than 12 months | Unrealized Losses
Collateralized mortgage obligations		(110)
Mortgage-backed securities	(40)	(365)
States and political subdivisions		(44)
Total securities by investment category		(519)
12 Months or More | Fair Value
Collateralized mortgage obligations	969	1,460
Mortgage-backed securities		91,824
States and political subdivisions		7,381
Total securities by investment category		100,665
12 Months or More | Unrealized Losses
Collateralized mortgage obligations	(305)	(270)
Mortgage-backed securities		(437)
States and political subdivisions		(859)
Total securities by investment category		(1,566)
Total Investments | Fair Value
Collateralized mortgage obligations	969	5,220
Mortgage-backed securities	10,127	153,544
States and political subdivisions		13,817
Total securities by investment category		172,581
Total Investments | Unrealized Losses
Collateralized mortgage obligations	(305)	(380)
Mortgage-backed securities	(40)	(802)
States and political subdivisions		(903)
Total securities by investment category		$ (2,085)